Fatal error: Uncaught Error: Class "Symfony\Component\Mailer\Transport\Smtp\EsmtpTransport" not found in /opt/lampp/htdocs/msjso/vendor/symfony/postmark-mailer/Transport/PostmarkSmtpTransport.php:28 Stack trace: #0 {main} thrown in /opt/lampp/htdocs/msjso/vendor/symfony/postmark-mailer/Transport/PostmarkSmtpTransport.php on line 28